Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual circuito Johnny Wakefield ganhou?
 ###Tabelas: CREATE TABLE foreign_players (foreign_players_id AUTO_INCREMENT PRIMARY KEY, Country VARCHAR, Player name VARCHAR, Period VARCHAR, Position VARCHAR, Matches VARCHAR, Goals VARCHAR) CREATE TABLE radio_singles (radio_singles_id AUTO_INCREMENT PRIMARY KEY, Single VARCHAR, CCM Chart VARCHAR, Debut VARCHAR, Peak Date VARCHAR, Peak Pos INT, Total Wks INT, Spins (since 1998) source: Mediabase INT) CREATE TABLE 1943 (1943_id AUTO_INCREMENT PRIMARY KEY, Title VARCHAR, Series VARCHAR, Director VARCHAR, Release date VARCHAR, reissue? VARCHAR) CREATE TABLE non-championship_grands_prix (non-championship_grands_prix_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Circuit VARCHAR, Date VARCHAR, Winning driver VARCHAR, Winning constructor VARCHAR, Report VARCHAR) CREATE TABLE international_tourism_expenditure (international_tourism_expenditure_id AUTO_INCREMENT PRIMARY KEY, Rank 2012 INT, Country VARCHAR, UNWTO Region VARCHAR, International tourism expenditure 2011 VARCHAR, International tourism expenditure 2012 VARCHAR, % change VARCHAR)  
SELECT Circuit FROM non-championship_grands_prix WHERE Winning driver = johnny wakefield